They adjust to fulfill their needs and adapt to

Could you correct any errors in this paragraph?

Mammals display a behaviour in which they live in harmony with the environment. They adjust to fulfill their needs and adapt to changes in the habitat they live in. Biology classifies humans as mammals merely because they breastfeed their young. This is only a minor characteristic of human biology and certainly does not reflect their true behaviour. What we observe in our surroundings is pollution, destruction, overexploitation of natural resources, overpopulation. These are all patterns associated with people. The only other organisms that exhibit such behaviours are viruses. They spreads across an area annihilating their host by devouring all the medium around them. Thus, humans are a disease, a plague that is proliferating all over our planet and consuming it root and branch. The only potential cure is a mass reduction in the human population, which will force the remaining survivors to drastically change the way they interact with our planet.

Thanks.

PD This is just hypotetical.